Home /
Search 🔍
the Site

World's #1 finishing resource since 1989
No login needed: Chime right in

topic 59774

What to do if AMS2759 heat treat cycle was interrupted

January 27, 2015

Q. During the first run to AMS2759, the furnace lost power after 5 hours of an 8-hour cycle. I'm reading the AMS and it doesn't clearly state what to do. Do I put it back in and restart the cycle? Do I have to plate it again?

Mike Chados
Engineer - Gainesville, Florida, USA

January 29, 2015

Hi Mike!

If you're referring to AMS2759/9 [affil. link to spec at Techstreet] baking after plating procedures, then when we've had power outages or other problems I look to the "Multistep Processes" wording in paragraph for guidance. Certainly you still have to contact the customer/design authority for resolution, but the hardness and time working of those paragraphs give a strong indicator of the relative severity of the issue.

Good luck!

lee gearhart
Lee Gearhart
metallurgist - E. Aurora, New York

January 30, 2015

Q. Thanks for the input. We are manufacturing 440C parts and have been told to perform this operation as an output of passivation as we have been told passivation is a form of plating. What are your thoughts on this?

Mike Chados [returning]
- Gainesville, Florida

January 2015

A. Hi Mike. Passivation is not a form of plating. With regard to the possible hydrogen embrittlement caused by passivation, please see letter 58390, "Hydrogen embrittlement from passivation?"


Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Chemicals &
Consult'g, Train'g
& Software

About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA